feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

web/services/settingsService.ts

@@ -0,0 +1,33 @@
+import { apiClient } from './apiClient';
+
+export const settingsService = {
+  async getVisionModels() {
+    const response = await apiClient.get('/models');
+    // Filter models that support vision or are of type vision
+    return response.data.filter((m: any) => m.supportsVision || m.type === 'vision');
+  },
+
+  async getVisionModel() {
+    const response = await apiClient.get('/v1/admin/settings');
+    return { visionModelId: response.data.selectedVisionId };
+  },
+
+  async updateVisionModel(selectedVisionId: string) {
+    const response = await apiClient.put('/v1/admin/settings', {
+      selectedVisionId,
+    });
+    return response.data;
+  },
+
+  async getLanguage() {
+    const response = await apiClient.get('/users/settings');
+    return response.data.language;
+  },
+
+  async updateLanguage(language: string) {
+    const response = await apiClient.put('/users/settings/language', {
+      language,
+    });
+    return response.data;
+  },
+};